Since Magento 1.7 it's only possible to use PayPal Pro or PayPal standard but not both.
In this scenario I cannot use PayPal Express because I have to pass through order data which gets lost using Express, so I need PayPal standard to be working as well.
In my time writing modules I've never seen anything configured in the new PayPal way in the Magento configuration so I'm not sure where to begin looking. If anyone can point me on the right direction I'll answer this with the solution.
As a side note, does anybody know exactly why Magento have enforced this?
UPDATE
I have tried setting the core_config_data
payment/paypal_standard/active and although both appear enabled in the admin, still only the direct method shows in the checkout.